An explosion-proof industrial vehicle cooler

Abstract

The present invention discloses an explosion-proof industrial vehicle cooler for an explosion-proof diesel engine, which comprises a box body. A purification chamber and a cooling chamber are provided inside the box body. A purification mechanism is arranged in the purification chamber. An air inlet and outlet corresponding to the position of the purification mechanism are provided on the side wall of the box body. Cooling pipes for the flow of coolant are arranged in the cooling chamber. The purification chamber and the cooling chamber are communicated, and an air outlet and exhaust port is provided in the cooling chamber. During the working process, the exhaust gas first enters the purification chamber through the air inlet and outlet, is purified by the purification mechanism and then enters the cooling chamber, and is then discharged through the air outlet and exhaust port after heat exchange with the cooling pipes. The purification mechanism and the cooling pipes are integrated in the box body. Compared with the split purifier and the explosion-proof industrial vehicle cooler, the volume of the explosion-proof industrial vehicle cooler provided by the present application is reduced, so it can be applied to the explosion-proof diesel engine to meet the requirements of purification and cooling of the explosion-proof diesel engine.

Description

Technical Field

[0001] The present invention relates to the technical field of internal combustion engines, and particularly to an explosion-proof industrial vehicle cooler. Background Art

[0002] Due to the limited space of the vehicle body of explosion-proof forklifts, the explosion-proof industrial vehicle cooler for cooling the exhaust gas of diesel engines cannot be designed large enough. Therefore, there are problems in the explosion-proof industrial vehicle cooler design, and the cooling performance cannot meet the operating requirements of forklifts under heavy load conditions. Moreover, once the water temperature or exhaust gas temperature exceeds the standard, the control system will force the vehicle to shut down to ensure safety, and the vehicle shutdown seriously affects the working efficiency of explosion-proof forklifts.

[0003] In addition, the space of explosion-proof forklifts is narrow, and the tail gas purifier needs to be designed in front of the explosion-proof industrial vehicle cooler, which greatly increases the design difficulty. At the same time, it is necessary to increase the connection surface, increasing the risk points. And adding a tail gas purifier will further increase the exhaust back pressure. The exhaust gas temperature of vehicles with tail gas purifiers is higher than that of ordinary forklifts, which leads to higher performance requirements for the exhaust explosion-proof industrial vehicle cooler, further increasing the design difficulty of the purifier and the explosion-proof industrial vehicle cooler. Existing explosion-proof forklifts are not equipped with tail gas purifiers. With the continuous improvement of emission standards, it has become a trend for diesel engines to be equipped with tail gas purifiers.

[0004] Therefore, how to meet the cooling and purification requirements of explosion-proof diesel engines is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] The object of the present invention is to provide an explosion-proof industrial vehicle cooler, which integrates a purification mechanism and cooling pipes in a box body, and has a smaller volume compared with a split-type purifier and explosion-proof industrial vehicle cooler, so it can be applied to explosion-proof diesel engines.

[0006] To achieve the above object, the present invention provides an explosion-proof industrial vehicle cooler for the diesel engine of an explosion-proof forklift, including a box body. The box body has a purification chamber and a cooling chamber. A purification mechanism is provided in the purification chamber. An air inlet and outlet corresponding to the position of the purification mechanism are provided on the side wall of the box body. Cooling pipes for the flow of coolant are provided in the cooling chamber. The purification chamber and the cooling chamber are communicated, and an air outlet and exhaust port are provided in the cooling chamber.

[0007] Preferably, the purification mechanism includes a purification cylinder, a purifier fixing flange, and a purifier. One end of the purification cylinder is welded and fixed to the flange plate of the purifier fixing flange. The flange pipe of the purifier fixing flange is hermetically connected to the air inlet and outlet. The purifier is arranged in the purification cylinder and hermetically connected to the flange plate of the purifier fixing flange.

[0008] Preferably, it further includes a pressing plate and fixing studs. There are installation gaps between both sides of the purifier and the purification cylinder. The pressing plate is located on the side of the purification mechanism away from the air inlet and outlet. Both ends of the pressing plate respectively extend into the installation gaps on both sides of the purification mechanism. The fixing studs are arranged in the installation gaps and fixedly connect the pressing plate with the inner wall of the box body to fix the purification mechanism.

[0009] Preferably, the purifier includes a diesel particulate filter and a diesel oxidation catalyst. The diesel particulate filter is located between the diesel oxidation catalyst and the fixed flange of the purifier.

[0010] Preferably, the box body includes an inner box body and an outer box body arranged outside the inner box body. A coolant cavity is formed between the inner box body and the outer box body. Both ends of the cooling pipe are respectively communicated with the upper and lower sides of the coolant cavity.

[0011] Preferably, a coolant partition is arranged in the coolant cavity. The coolant partition divides the coolant cavity into a liquid inlet cavity and a liquid outlet cavity. The outer box body is provided with a liquid outlet pipe communicated with the liquid outlet cavity, and the liquid inlet cavity is provided with a liquid inlet pipe.

[0012] Preferably, the side of the inner box body opposite to the air inlet and outlet is an inner hexagon sealing plate. The inner hexagon sealing plate is provided with the inner installation holes for disassembling and assembling the purification mechanism. The side of the outer box body opposite to the air inlet and outlet is an outer hexagon sealing plate. The outer hexagon sealing plate is provided with outer installation holes for disassembling and assembling the purification mechanism. The inner box body further includes an inner cavity cover plate for sealing the inner installation holes, and the outer box body includes an outer cavity cover plate for sealing the outer installation holes.

[0013] Preferably, the cooling pipes are arranged in a row along the length direction parallel to the purification mechanism to form a cooling pipe row. At least two rows of the cooling pipe rows are arranged in the cooling cavity. A partition is arranged in the inner box body. The partition includes a first partition between the cooling cavity and the purification cavity and a second partition between two adjacent rows of the cooling pipe rows. The first partition and the second partition divide the cooling cavity to form a cooling flow channel. The tail gas flows along the cooling flow channel and exchanges heat with each row of the cooling pipe rows in turn.

[0014] Preferably, the side of the inner box body close to the air inlet and outlet is an inner pentagon sealing plate. The side of the outer box body provided with the air inlet and outlet is an outer pentagon sealing plate. A sleeve perpendicular to the outer pentagon sealing plate is arranged in the outer box body. The sleeve passes through the inner box body and the inner box body is hermetically connected with the sleeve. Installation studs for connecting an explosion-proof diesel engine are arranged in the sleeve. One end of the installation stud away from the outer pentagon sealing plate is provided with an installation nut. A sealing sleeve for sealing the sleeve is arranged between the installation nut and the sleeve.

[0015] Preferably, the cooling pipe is a finned tube.

[0016] The explosion-proof industrial vehicle cooler provided by the present invention is used for an explosion-proof diesel engine and includes a box body. A purification chamber and a cooling chamber are provided inside the box body. A purification mechanism is provided in the purification chamber. An air inlet and outlet corresponding to the position of the purification mechanism are provided on the side wall of the box body. A cooling pipe for the flow of coolant is provided in the cooling chamber. The purification chamber and the cooling chamber are communicated, and an air outlet and exhaust port is provided in the cooling chamber.

[0017] During the working process, the exhaust gas first enters the purification chamber through the air inlet and outlet, is purified by the purification mechanism and then enters the cooling chamber, and then is discharged from the air outlet and exhaust port after exchanging heat with the cooling pipe. The purification mechanism and the cooling pipe are integrated in the box body. Compared with the split purifier and the explosion-proof industrial vehicle cooler, the volume of the explosion-proof industrial vehicle cooler provided by the present application is reduced, so it can be applied to the explosion-proof diesel engine to meet the requirements of purification and cooling of the explosion-proof diesel engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0019] Figure 1 is a schematic structural diagram of the explosion-proof industrial vehicle cooler provided by the present invention;

[0020] Figure 2 is Figure 1 a top view of the explosion-proof industrial vehicle cooler in

[0021] Figure 3 is Figure 2 a sectional view taken along line A-A in

[0022] Figure 4 is Figure 2 a sectional view taken along line B-B in

[0023] Figure 5 is Figure 2 a sectional view taken along line C-C in

[0024] Wherein, Figures 1 to 5 the reference numerals in

[0025] Exhaust flange 1, intake and exhaust port 2, liquid inlet pipe 3, intake and exhaust flange 4, outer five-sided seal plate 5, liquid outlet pipe 6, finned tube 7, inner cavity cover plate 8, sleeve 9, diesel particulate filter 10, diesel oxidation catalyst 11, purifier fixing flange 12, first fixing nut 13, inner cover bolt 14, inner cover nut 15, outer cavity cover plate 16, seal sleeve 17, mounting nut 18, mounting stud 19, fixing stud 20, second fixing nut 21, outer cover bolt 22, outer cover nut 23, purifier first seal plate 24, purifier second seal plate 25, purifier third seal plate 26, purifier fourth seal plate 27, first partition plate 28, second partition plate 29, exhaust duct 30, outer first seal plate 31, outer second seal plate 32, inner first seal plate 33, inner second seal plate 34, pressing plate 35, coolant partition plate 36, inner third seal plate 37, outer third seal plate 38, inner sixth seal plate 39. Detailed implementation manner

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In order to enable those skilled in the art of the present technology to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0028] Please refer to Figures 1 to 5 , Figure 1 , which is a schematic structural diagram of the explosion-proof industrial vehicle cooler provided by the present invention; Figure 2 is Figure 1 the top view of the explosion-proof industrial vehicle cooler in Figure 3 is Figure 2 the sectional view taken along A-A in Figure 4 is Figure 2 the sectional view taken along B-B in Figure 5 is Figure 2 the sectional view taken along C-C in

[0029] The explosion-proof industrial vehicle cooler provided by the present invention is used for an explosion-proof diesel engine. The explosion-proof industrial vehicle cooler includes a box body, such as Figure 1As shown, the box body has an intake and exhaust port 2 and an outlet exhaust port. The tail gas enters the box body through the intake and exhaust port 2, and after purification and cooling, it is discharged from the outlet exhaust port. An outlet exhaust duct 30 is also provided at the outlet exhaust port. The outlet exhaust duct 30 is connected with an outlet exhaust flange 1, and the outlet exhaust flange 1 can be connected to an exhaust pipe or the like. The box body has a purification chamber and a cooling chamber. A purification mechanism is provided in the purification chamber, and the position of the purification mechanism corresponds to that of the exhaust port. Therefore, after passing through the intake and exhaust port 2, the tail gas first enters the purification mechanism for purification. The purification chamber and the cooling chamber are connected. The purified tail gas enters the cooling chamber. A cooling pipe is provided in the cooling chamber. The coolant flows in the cooling pipe, and the tail gas flows outside the cooling pipe, thereby exchanging heat with the coolant and reducing the temperature. The outlet exhaust port is connected with the cooling chamber, and the heat-exchanged tail gas is discharged from the outlet exhaust port.

[0030] Optionally, the cooling pipe can adopt a finned tube 7. The finned tube 7 can increase the heat exchange area with the tail gas, thereby improving the heat exchange effect. Of course, users can also adopt heat exchange tubes with other structures according to needs, which are not limited here.

[0031] Optionally, the box body adopts a double-layer structure. As Figure 2 and Figure 3 shown, the box body includes an inner box body and an outer box body. The inner box body is arranged inside the outer box body. The inner box body is formed into a cuboid structure by an inner first seal plate 33, an inner second seal plate 34, an inner third seal plate 37, an inner fourth seal plate, an inner fifth seal plate, and an inner sixth seal plate 39. The outer box body is formed into a cuboid structure by an outer first seal plate 31, an outer second seal plate 32, an outer third seal plate 38, an outer fourth seal plate, an outer fifth seal plate 5, and an outer sixth seal plate. The side walls on six sides of the inner box body are all separated from the inner side walls of the outer box body by a certain distance. Therefore, a coolant chamber is formed between the inner box body and the outer box body. Support rods or the like for supporting the inner box body can be arranged in the coolant chamber. The two ends of the cooling pipe are respectively connected to the two opposite sides of the coolant chamber. The outer box body is also provided with a liquid inlet pipe 3 and a liquid outlet pipe 6. The coolant enters the coolant chamber through the liquid inlet pipe 3, then enters the cooling pipe from the coolant chamber, and finally the coolant returning to the coolant chamber is discharged from the liquid outlet pipe 6. The tail gas can not only exchange heat with the coolant through the cooling pipe, but also exchange heat with the coolant through the side wall of the inner box body, further increasing the heat exchange area and improving the heat exchange efficiency.

[0032] In addition, to ensure sufficient heat exchange of the coolant, the liquid inlet pipe 3 and the liquid outlet pipe 6 are respectively connected to two opposite side walls of the outer box body. The outer first seal plate 31 and the outer third seal plate 38 are side walls perpendicular to the length direction of the outer box body. The liquid inlet pipe 3 and the liquid outlet pipe 6 can be respectively connected to the outer first seal plate 31 and the outer third seal plate 38.

[0033] A coolant partition 36 is provided in the coolant chamber, and the coolant partition 36 is perpendicular to the cooling pipe. As Figure 3As shown, the coolant partition plate 36 divides the coolant chamber into an inlet chamber and an outlet chamber. The outlet pipe 6 communicates with the outlet chamber, and the inlet pipe 3 communicates with the inlet chamber. The coolant partition plate 36 separates the coolant chamber, so the coolant must pass through the cooling pipe before flowing into the outlet pipe 6, ensuring the stable operation of the cooling pipe. The outer first sealing plate 31, the outer second sealing plate 32, the outer third sealing plate 38, and the outer fourth sealing plate are all connected to the coolant partition plate 36. The coolant partition plate 36 can be arranged in the middle of the four sealing plates, making the volumes of the coolant chamber on both sides of the coolant partition plate 36 approximately equal.

[0034] Optionally, the purification mechanism includes a purification cylinder, a purifier fixing flange 12, and a purifier. The purification cylinder includes a purifier first sealing plate 24, a purifier second sealing plate 25, a purifier third sealing plate 26, and a purifier fourth sealing plate 27. The four are connected to form a cylindrical structure with a rectangular cross-section. The purifier and the purifier fixing flange 12 are arranged in the purification cylinder. The air inlet and outlet 2 is located on the side where the outer fifth sealing plate 5 is located. The inner fifth sealing plate corresponds to the position of the outer fifth sealing plate 5, and the inner fifth sealing plate is provided with a through hole corresponding to the position of the air inlet and outlet 2. The purifier fixing flange 12 includes a flange plate and a flange pipe. The flange pipe passes through the through hole of the inner fifth sealing plate and is connected to the air inlet and outlet 2. Both the through hole and the air inlet and outlet 2 are hermetically connected to the flange pipe. The purifier is fixedly welded to the flange plate, and the tail gas enters the purifier through the flange pipe. One end of the purification cylinder is also fixedly welded to the flange plate.

[0035] Optionally, the purification mechanism further includes a pressing plate 35 and fixing studs 20. As Figure 4 and Figure 5 shown, there are installation gaps between the two sides of the purifier and the purification cylinder. The pressing plate 35 is located on the side of the purification mechanism away from the air inlet and outlet 2, and both ends of the pressing plate 35 extend into the installation gaps on both sides of the purification mechanism. The fixing studs 20 are arranged in the installation gaps and fixedly connect the pressing plate 35 to the inner wall of the box body. The flange plate of the purifier fixing flange 12 and the inner fifth sealing plate both have through holes. The fixing studs 20 pass through the through holes and are connected to the first fixing nut 13. The other end of the fixing stud 20 passes through the pressing plate 35 and is connected to the second fixing nut 21. The bolt pre-tightening force presses the purification mechanism and the inner fifth sealing plate through the pressing plate 35, further fixing the purification mechanism. In addition, for the convenience of installation, the first fixing nut 13 can be fixedly welded to the inner fifth sealing plate.

[0036] The purifier includes a diesel particulate filter 10 and a diesel oxidation catalyst 11. The diesel particulate filter 10 is located between the diesel oxidation catalyst 11 and the purifier fixing flange 12. The diesel particulate filter 10 first filters the exhaust gas, and then the diesel oxidation catalyst 11 purifies the exhaust gas. Since the purifier is arranged at the exhaust port of the explosion-proof diesel engine, the exhaust temperature has reached the temperature required for the reaction of hydrocarbons and carbon monoxide. Therefore, precious metals such as platinum and palladium and rare metals are not required as catalysts in the diesel oxidation catalyst 11 for the reaction, which greatly reduces the cost of the diesel oxidation catalyst 11.

[0037] Optionally, the side of the inner box body opposite to the air inlet and outlet 2 is an inner hexagon sealing plate 39. The inner hexagon sealing plate 39 is provided with an inner installation hole. The side of the outer box body opposite to the air inlet and outlet 2 is an outer hexagon sealing plate, and the outer hexagon sealing plate is provided with an outer installation hole. The positions of the inner installation hole and the outer installation hole correspond to the position of the purification mechanism to form a purifier installation hole. The purification mechanism can be disassembled and assembled through the purifier installation hole. The inner box body includes an inner cavity cover plate 8 for sealing the inner installation hole. The inner cavity cover plate 8 is fixedly connected to the inner hexagon sealing plate 39 through inner cover bolts 14 and inner cover nuts 15. The outer box body includes an outer cavity cover plate 16 for sealing the outer installation hole. The outer cavity cover plate 16 is fixedly connected to the outer hexagon sealing plate through outer cover bolts 22 and outer cover nuts 23. When installing the purification mechanism, insert the flange pipe of the purifier fixing flange 12 into the through hole of the inner five-sided sealing plate, then through the fixing stud 20 and the first fixing nut 13, and then press the purification mechanism through the pressing plate 35 and the second fixing nut 21. Finally, install the inner cavity cover plate 8 and the outer cavity cover plate 16. The disassembly process is opposite to the installation process. The disassembly and assembly process of the purification mechanism is simple and convenient for maintenance.

[0038] Optionally, the cooling pipes are arranged along the length direction parallel to the purification mechanism to form a cooling pipe row. As Figure 4 and Figure 5 shown, there are two rows of cooling pipe rows in the cooling cavity. A partition plate is provided in the inner box body. The partition plate includes a first partition plate 28 located between the cooling cavity and the purification cavity and a second partition plate 29 located between two adjacent rows of cooling pipe rows. The first partition plate 28 and the second partition plate 29 divide the interior of the box body into three layers of space. One layer is the purification chamber, and the other two layers are two-stage cooling flow channels where the two rows of cooling pipe rows are located. Both the first partition plate 28 and the second partition plate 29 form cooling air inlets with the side walls of the inner box body. The two cooling air inlets are respectively close to the inner one-sided sealing plate 33 and the inner three-sided sealing plate 37. Therefore, the exhaust gas needs to flow along the S-shaped cooling flow channel in the cooling cavity and exchange heat with each row of cooling pipe rows in turn. The structure of the cooling flow channel can not only extend the heat exchange time of the exhaust gas but also will not increase the exhaust resistance. Of course, multiple rows of cooling pipe rows can also be arranged in the cooling cavity. The cooling air inlets formed between the adjacent second partition plates 29 and the side walls of the inner box body are respectively close to the inner one-sided sealing plate 33 and the inner three-sided sealing plate 37, so as to ensure that the exhaust gas will still flow along the S-shaped cooling flow channel and make full use of the cooling pipes for heat exchange.

[0039] Optionally, the outer five-sided plate 5 is provided with an air inlet and exhaust installation opening, and an air inlet and exhaust flange 4 is provided in the air inlet and exhaust installation opening. The thickness of the air inlet and exhaust flange 4 is greater than that of the outer five-sided plate 5. The air inlet and exhaust flange 4 forms a connection surface that can be fitted to the explosion-proof diesel engine, and the connection surface is higher than the plane where the outer five-sided plate 5 is located. Fitting the connection surface to the explosion-proof diesel engine can improve the sealing performance between the cooler of the explosion-proof industrial vehicle and the explosion-proof diesel engine, and reduce the leakage of exhaust gas.

[0040] Optionally, the cooler of the explosion-proof industrial vehicle can be connected to the explosion-proof diesel engine through mounting studs 19. The air inlet and exhaust flange 4 is provided with connection holes corresponding to the positions of each air inlet and exhaust port 2. As Figure 1 shown, each air inlet and exhaust port 2 corresponds to two connection holes, and the two connection holes are centrosymmetric about the geometric center of the air inlet and exhaust port 2. A sleeve 9 perpendicular to the outer five-sided plate 5 is provided in the connection hole. Both the inner five-sided plate and the inner cavity cover plate 8 are provided with insertion holes corresponding to the position of the sleeve 9. The sleeve 9 passes through the inner layer of the box body through the insertion hole and is hermetically connected to the inner five-sided plate. The mounting stud 19 is arranged in the sleeve 9, and one end thereof passes through the connection hole and extends to the outside of the air inlet and exhaust flange 4 for connecting the explosion-proof diesel engine. The end of the mounting stud 19 away from the outer five-sided plate 5 passes through the insertion hole of the inner cavity cover plate 8 and is connected to the mounting nut 18. The mounting nut 18 fixedly connects the cooler of the explosion-proof industrial vehicle and the explosion-proof diesel engine through the bolt pre-tightening force. A seal sleeve 17 is provided between the mounting nut 18 and the sleeve 9, and the seal sleeve 17 can seal the sleeve 9 to prevent the coolant from entering the sleeve 9.

[0041] In this embodiment, the cooler of the explosion-proof industrial vehicle integrates the cooling pipes and the purification mechanism in the box body, and the exhaust gas flows through the purification mechanism and the cooling pipes in sequence to achieve purification and cooling. The cooling pipes and the purification mechanism are integrally arranged, so the occupied volume is relatively small, and it can be applied to the explosion-proof diesel engine. The box body of the cooler of the explosion-proof industrial vehicle adopts a double-layer structure, and the coolant cavity between the inner layer box body and the outer layer box body is filled with coolant; at the same time, the cooling cavity is blocked by the second partition plate 29 to form an S-shaped cooling channel, which further increases the heat exchange area between the exhaust gas and the coolant, improves the heat exchange efficiency of the cooler of the explosion-proof industrial vehicle, and reduces the resistance of the cooling mechanism to the exhaust gas. In addition, the cooler of the explosion-proof industrial vehicle, the fixed flange of the explosion-proof industrial vehicle cooler and the cooling cylinder are integrated into a cooling mechanism, and the cooling mechanism can be integrally disassembled and assembled, and the disassembly and assembly efficiency is higher, which is convenient for maintenance.

[0042] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0043] The above has introduced the explosion-proof industrial vehicle cooler provided by the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An explosion-proof industrial vehicle cooler for an explosion-proof diesel engine, characterized in that, It includes a box body. A purification chamber and a cooling chamber are provided inside the box body. A purification mechanism is provided in the purification chamber. An air inlet and outlet (2) corresponding to the position of the purification mechanism is provided on the side wall of the box body. A cooling pipe for the flow of coolant is provided in the cooling chamber. The purification chamber and the cooling chamber are communicated. An air outlet and exhaust port is provided in the cooling chamber. The purification mechanism includes a purification cylinder, a purifier fixing flange (12) and a purifier. One end of the purification cylinder is welded and fixed to the flange plate of the purifier fixing flange (12). The flange pipe of the purifier fixing flange (12) is hermetically connected to the air inlet and outlet (2). The purifier is arranged inside the purification cylinder and is hermetically connected to the flange plate of the purifier fixing flange (12). It also includes a pressing plate (35) and fixing studs (20). An installation gap is provided between the two sides of the purifier and the purification cylinder. The pressing plate (35) is located on the side of the purification mechanism away from the air inlet and outlet (2). The two ends of the pressing plate (35) respectively extend into the installation gaps on both sides of the purification mechanism. The fixing studs (20) are arranged in the installation gaps and fixedly connect the pressing plate (35) to the inner wall of the box body to fix the purification mechanism. The box body includes an inner box body and an outer box body arranged outside the inner box body. A coolant chamber is formed between the inner box body and the outer box body. The two ends of the cooling pipe are respectively communicated with the upper and lower sides of the coolant chamber. One side of the outer box body with the air inlet and outlet (2) is an outer five-sided plate (5). One side of the inner box body corresponding to the outer five-sided plate (5) is an inner five-sided plate. The flange pipe passes through the through hole of the inner five-sided plate and is connected to the air inlet and outlet (2). The fixing stud (20) passes through the through holes on both the flange plate and the inner five-sided plate and is connected to the first fixing nut (13). The other end of the fixing stud (20) passes through the pressing plate (35) and is connected to the second fixing nut (21). One side of the inner box body opposite to the air inlet and outlet (2) is an inner six-sided plate. The inner six-sided plate is provided with an inner installation hole for disassembling and assembling the purification mechanism. One side of the outer box body opposite to the air inlet and outlet (2) is an outer six-sided plate. The outer six-sided plate is provided with an outer installation hole for disassembling and assembling the purification mechanism. The inner box body also includes an inner cavity cover plate (8) for sealing the inner installation hole. The outer box body includes an outer cavity cover plate (16) for sealing the outer installation hole.

2. The explosion-proof industrial vehicle cooler according to claim 1, wherein, The purifier includes a diesel particulate filter (10) and a diesel oxidation catalyst (11). The diesel particulate filter (10) is located between the diesel oxidation catalyst (11) and the purifier fixing flange (12).

3. The explosion-proof industrial vehicle cooler according to claim 1, wherein A coolant partition plate (36) is provided in the coolant chamber. The coolant partition plate (36) isolates the coolant chamber to form a liquid inlet chamber and a liquid outlet chamber. The outer box body is provided with a liquid outlet pipe (6) communicated with the liquid outlet chamber. The liquid inlet chamber is provided with a liquid inlet pipe (3).

4. The explosion-proof industrial vehicle cooler according to claim 1, wherein The cooling pipes are arranged along the length direction parallel to the purification mechanism to form a cooling pipe row, at least two rows of the cooling pipe rows are arranged in the cooling cavity, a partition plate is arranged in the inner layer box body, the partition plate includes a first partition plate (28) between the cooling cavity and the purification cavity and a second partition plate (29) between two adjacent rows of the cooling pipe rows, the first partition plate (28) and the second partition plate (29) partition the cooling cavity to form a cooling flow channel, and the tail gas flows along the cooling flow channel and exchanges heat with each row of the cooling pipe rows in sequence.

5. The explosion-proof industrial vehicle cooler according to claim 1, wherein One side of the inner layer box body close to the air inlet and outlet (2) is an inner five-sided sealing plate, one side of the outer layer box body provided with the air inlet and outlet (2) is an outer five-sided sealing plate (5), a sleeve (9) perpendicular to the outer five-sided sealing plate (5) is arranged in the outer layer box body, the sleeve (9) passes through the inner layer box body, and the inner layer box body is hermetically connected with the sleeve (9), an installation stud for connecting an explosion-proof diesel engine is arranged in the sleeve (9), an installation nut (18) is arranged at one end of the installation stud far away from the outer five-sided sealing plate (5), and a sealing sleeve (17) for sealing the sleeve (9) is arranged between the installation nut (18) and the sleeve (9).

6. The explosion-proof industrial vehicle cooler according to claim 4, characterized in that, The cooling pipe is a finned tube (7).

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